charset in the admin area

hi!
I sucessfully changed charset in the catalog area, and everything is working just fine, but in the admin area, where I have the name of the store, address, invoices, comments from the shop, attributes for the producs (this is all I noticed so far) the letters are not showing right.
is there a way this can be fixed?
thanks!

How did you change it in the catalog area ?
The same procedure applies to the admin area ... edit the appropriate language file.

all right, I changed the code in admin/includes/languages/english in english.php. my only question is: is this the only place where I have to make the change?

The language files are the place to set your CHARSET, as they affect the storefront and admin interfaces.